feat: complete LOOP-WP-0003 and LOOP-WP-0004

Registry hygiene: 3-round pilot bootstrap smoke, helix_forge rollout
expansion, daily cadence promotion (DEC-006). Loop regulator: daily
collector and weekly session cadence (DEC-007), rotation runbook (T09).

loops/registry-hygiene/cadence.yml

@@ -1,6 +1,10 @@
 loop: registry-hygiene
-phase: bootstrap
-cron: "20 * * * *"
+phase: stabilize
+cron: "0 7 * * *"
 batch_size: 3
-regulator_approval: pending
-notes: Hourly round-robin on custodian pilot slice; delegate SBOM to activity-core job
+domain_rotation: daily
+promoted_at: "2026-06-18"
+regulator_approval: approved
+notes: >
+  Bootstrap 3/3 rounds complete (2026-06-18). Promoted hourly→daily per DEC-006.
+  helix_forge added to rollout (T06). Weekly promotion deferred until 2 weeks daily.